how many gallons do you use for you guys that use McKenzie ultimate acid in the auto tanner? ive only done a couple capes so far with van dykes pickling crystals and I don't really like the lack of stretch that I'm getting compared to pickling in tubs with the mckenzie acid. Also ive put McKenzie brush on tan oil onto the capes after van dykes crystals and the capes turned a bright violet color. Not sure what is the deal with that. I don't really like having to go back to salting though. Not sure if there is some other suggestions out there.